code: def __init__(self):
      pass
  
imports: import os
  import numpy
  from tqdm import tqdm
  from paddlehub.common.logger import logger
  from slda_news.document import LDADoc, SLDADoc, Token, Sentence
  from slda_news.vose_alias import VoseAlias
  from slda_news.util import rand, rand_k
label_desc: Use image node_id 1 to create a new Sampler object from inherited base classes: object with example: obj = Sampler()